Behaviors and mechanism of iron extraction from chloride solutions using undiluted Cyphos IL 101
| dc.contributor.author | Cui, L. | |
| dc.contributor.author | Cheng, F. | |
| dc.contributor.author | Zhou, J. | |
| dc.date.issued | 2015 | |
| dc.description.abstract | In this study, iron(III) extraction from acidic chloride solutions using undiluted trihexyltetradecylphosphonium chloride (Cyphos IL 101) was carried out in a liquid–liquid extraction process. The extraction behaviors under various HCl, chloride, and iron(III) concentrations; selectivity; and extraction isotherm of iron(III) were investigated. It was found that iron(III) was extracted fast and efficiently in a wide chloride concentration range. The highly selective separation of iron(III) from aluminum(III), calcium(II), magnesium(II), and potassium(I) in acidic chloride solutions was achieved with a separation factor of Fe(III) over Al(III) at 11 000 from a 3 M HCl solution. The maximum loading capacity of iron(III) reached 83.2 g·L–1 with a molar ratio of 0.91 for Fe(III)/Cyphos IL 101. Effective stripping of the loaded iron(III) was achieved with a 0.5 M H2SO4 solution. The iron-chloro complexes in both aqueous phase and Cyphos IL 101 phase were characterized using spectroscopic techniques. Ultraviolet–visible and Raman spectra confirmed that iron(III) formed a series of iron-chloro complexes in acidic chloride solutions, while present solely in the form of tetrachloroferrate complex ([FeCl4]−) in the Cyphos IL 101 phase. An extraction mechanism was proposed in which both FeCl3 ion association and [FeCl4]− anion exchange with the chloride anion of Cyphos IL 101 play the key role during iron(III) extraction. | |
| dc.identifier.citation | Industrial & Engineering Chemistry Research, 2015; 54(30):7534-7542 | |
| dc.identifier.doi | 10.1021/acs.iecr.5b01546 | |
| dc.identifier.issn | 0888-5885 | |
| dc.identifier.issn | 1520-5045 | |
| dc.identifier.uri | https://hdl.handle.net/11541.2/111555 | |
| dc.language.iso | en | |
| dc.publisher | American Chemical Society | |
| dc.relation.funding | ARC DE120101788 | |
| dc.rights | Copyright 2015 American Chemical Society | |
| dc.source.uri | https://doi.org/10.1021/acs.iecr.5b01546 | |
| dc.subject | iron extraction | |
| dc.subject | chloride solution | |
| dc.subject | Cyphos IL 101 | |
| dc.title | Behaviors and mechanism of iron extraction from chloride solutions using undiluted Cyphos IL 101 | |
| dc.type | Journal article | |
| pubs.publication-status | Published | |
| ror.mmsid | 9915966511801831 |